Conteúdo do Curso

C Structs

1. Introduction to Structs

What are Structs Structs Application Defining and Declaring Structs Creating Your First Struct Accessing Struct Fields

2. Pointers and Structs

Pointers Brief Overview Pointers to Structs Pointers Inside Structs Dynamically Allocating Structs Passing Structs to the Functions

3. Structs and Memory

Understanding Memory Layout of Structs Alignment and Padding in Structs Unions Arrays with Structs

4. Advanced Structs Usage

Nested Structs Struct with Arrays and Other Structs Anonymous Struct and Union Complex Data Structure

5. Implementing Data Structures

Introduction to Linked List Basic Concept and Structure Building a Linked List Travesting and Displaying Linked List Completion Overview

Pointers to Structs

The C programming language allows you to create pointers not only to regular data types but also to structures (since a structure is a custom data type).

Declaration and initialization of a pointer looks like this:

If <name_of_pointer> is a pointer to a structure,
then *(<name_of_pointer>) is the structure itself.

To access the fields of a structure through a pointer, you must use the -> operator.

Note
"->" is an analogue of the structure access operator .

main


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#include <stdio.h>

// structure declaration
struct Point {
    int x;
    int y;
};

int main() {
    // create a structure variable of Point type
    struct Point p1;
    p1.x = 10;
    p1.y = 20;

    // create a pointer to a structure of type Point and assign it the address of variable p1
    struct Point* ptr = &p1;

    // Access structure members via pointer by `->` operator
    printf("Coordinates: (%d, %d)\n", ptr->x, ptr->y);

    return 0;
}

Tarefa

Declare structure Human which contains two fields name and age;
Initialize the structure worker and fill the fields;
Declare and initialize a pointer ptr to a worker;
Display information about the worker.

Tarefa

Declare structure Human which contains two fields name and age;
Initialize the structure worker and fill the fields;
Declare and initialize a pointer ptr to a worker;
Display information about the worker.

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Seção 2. Capítulo 2

Pointers to Structs

The C programming language allows you to create pointers not only to regular data types but also to structures (since a structure is a custom data type).

Declaration and initialization of a pointer looks like this:

If <name_of_pointer> is a pointer to a structure,
then *(<name_of_pointer>) is the structure itself.

To access the fields of a structure through a pointer, you must use the -> operator.

Note
"->" is an analogue of the structure access operator .

main


              12345678910111213141516171819202122
            
#include <stdio.h>

// structure declaration
struct Point {
    int x;
    int y;
};

int main() {
    // create a structure variable of Point type
    struct Point p1;
    p1.x = 10;
    p1.y = 20;

    // create a pointer to a structure of type Point and assign it the address of variable p1
    struct Point* ptr = &p1;

    // Access structure members via pointer by `->` operator
    printf("Coordinates: (%d, %d)\n", ptr->x, ptr->y);

    return 0;
}

Tarefa

Declare structure Human which contains two fields name and age;
Initialize the structure worker and fill the fields;
Declare and initialize a pointer ptr to a worker;
Display information about the worker.

Tarefa

Declare structure Human which contains two fields name and age;
Initialize the structure worker and fill the fields;
Declare and initialize a pointer ptr to a worker;
Display information about the worker.

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Seção 2. Capítulo 2

Pointers to Structs

The C programming language allows you to create pointers not only to regular data types but also to structures (since a structure is a custom data type).

Declaration and initialization of a pointer looks like this:

If <name_of_pointer> is a pointer to a structure,
then *(<name_of_pointer>) is the structure itself.

To access the fields of a structure through a pointer, you must use the -> operator.

Note
"->" is an analogue of the structure access operator .

main


              12345678910111213141516171819202122
            
#include <stdio.h>

// structure declaration
struct Point {
    int x;
    int y;
};

int main() {
    // create a structure variable of Point type
    struct Point p1;
    p1.x = 10;
    p1.y = 20;

    // create a pointer to a structure of type Point and assign it the address of variable p1
    struct Point* ptr = &p1;

    // Access structure members via pointer by `->` operator
    printf("Coordinates: (%d, %d)\n", ptr->x, ptr->y);

    return 0;
}

Tarefa

Declare structure Human which contains two fields name and age;
Initialize the structure worker and fill the fields;
Declare and initialize a pointer ptr to a worker;
Display information about the worker.

Tarefa

Declare structure Human which contains two fields name and age;
Initialize the structure worker and fill the fields;
Declare and initialize a pointer ptr to a worker;
Display information about the worker.

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Tudo estava claro?

The C programming language allows you to create pointers not only to regular data types but also to structures (since a structure is a custom data type).

Declaration and initialization of a pointer looks like this:

If <name_of_pointer> is a pointer to a structure,
then *(<name_of_pointer>) is the structure itself.

To access the fields of a structure through a pointer, you must use the -> operator.

Note
"->" is an analogue of the structure access operator .

main


              12345678910111213141516171819202122
            
#include <stdio.h>

// structure declaration
struct Point {
    int x;
    int y;
};

int main() {
    // create a structure variable of Point type
    struct Point p1;
    p1.x = 10;
    p1.y = 20;

    // create a pointer to a structure of type Point and assign it the address of variable p1
    struct Point* ptr = &p1;

    // Access structure members via pointer by `->` operator
    printf("Coordinates: (%d, %d)\n", ptr->x, ptr->y);

    return 0;
}

Tarefa

Declare structure Human which contains two fields name and age;
Initialize the structure worker and fill the fields;
Declare and initialize a pointer ptr to a worker;
Display information about the worker.

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Seção 2. Capítulo 2

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